We have a Kenmore 253.28432800, about 11 years now. It has the digital coldness setting on the door. Recently it has quit running a few times, the display goes blank or to "0", and the only way to get it going again is to unplug it and plug it back in (no significant delay required). I'm guessing the display/controller needs to be replaced, but is there any way to test it to confirm this?

I bought a new controller, $90. It was stupid-simple to install, popped the old one off with a putty knife and the new one plugged right in, took about 2 minutes. It's been working for almost two days now, hopefully this takes care of it. I generally don't like throwing money at a problem without more proof of the issue, but the amount of time and money invested in the contents of this freezer made this decision an easy one.